Why are seeds an evolutionary advantage for seed plants? Seeds allow for the transport of water and nutrients.
Seeds develop into adults without sexual reproduction.
Seeds protect and nourish young, growing plants.
Seeds provide the materials for photosynthesis.

SEEDS ALLOW THE TRANSPORT OF WATER AND NUTRIENTS.

Explanation:

several layers of hardened tissue prevent desiccation, freeing reproduction from the need for a constant supply of water. Seeds contain an embryo that allows them to remain dormant until such time that their environmental conditions improve before they can grow and develop into plants.

looks like the answer is     c     to me!

the calvin cycle takes place in the stroma of the chloroplast. carbon dioxide enters the stroma of the chloroplast to combine with the five-carbon compound called ribulose1, 5-biphosphate to form two molecules of a three-carbon compound called 3-phosphoglyceric acid. this reaction is catalyzed by an enzyme called ribulose bi-phosphate carboxylase.